ABSTRACT
This paper summarises the latest work carried out by the authors on the dynamic behaviour of various structures in Spain. After briefly reviewing the state-of-the-art on the subject, the description of the most relevant structures that are object of the study is included, a road and a railway bridge, as well as the installed monitoring and the dynamic analysis carried out. As most relevant results, the main conclusions for the road structure regarding the evolution over time of the dynamic parameters are presented, as well as the improvements in the calculation of the modal damping ratio. In this last case, the results obtained by applying different calculation methods are also shown, including an alternative methodology based on the reduction of the spectrum, whose main advantage is that it does not require the use of filters in multiple-degree-of-freedom systems, which contributes to reduce perturbations in the results.
